<!DOCTYPE html>
<html>
<head>
    <title>OpenSeadragon Memory Check With Simple Image Demo</title>
    <script type="text/javascript" src='../../build/openseadragon/openseadragon.js'></script>
    <style type="text/css">

      .openseadragon1 {
          width: 800px;
          height: 600px;
      }

    </style>
</head>
<body>
    <div>
        Simple demo page to monitor OpenSeadragon Memory Usage.
    </div>
    <!-- To get "Total canvas memory use exceeds the maximum limit" warning and then "null is not an object (evaluating 'smallContext.drawImage')" error,
    disable _freeupCanvasMemory method in ImageTileSource,
    then click Create button below 12 times on "iPad Air (3rd generation) -- 13.3" Simulator on Mac with Web Inspector by Safari. -->
    <button onclick="createViewer()">Create</button>
    <button onclick="destroyViewer()">Destroy</button>

    <div id="contentDiv" class="openseadragon1"></div>
    <script type="text/javascript">

        var _viewer;

        function createViewer() {
            if ( _viewer ) {
                destroyViewer();
            }

            _viewer = OpenSeadragon({
                element: document.getElementById("contentDiv"),
                showNavigationControl: false,
                prefixUrl: "../../build/openseadragon/images/",
                tileSources: {
                    type: "image",
                    url: "../data/CCyan.png"
                }
            });
        }

        function destroyViewer() {
            if ( _viewer ) {
                _viewer.destroy();
            }
            _viewer = null;
        }

    </script>
</body>
</html>
